Indications of Genetic Admixture in the Transition Zone between Fagus sylvatica L. and Fagus sylvatica ssp. orientalis Greut. &amp; Burd

Müller, Markus; Lopez, P.A.; Papageorgiou, Aristotelis C.; Tsiripidis, Ioannis; Gailing, Oliver

doi:10.3390/d11060090

Cited by 19 publications

(29 citation statements)

References 44 publications

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“…Considering the botanical description of both beech species occurring in the region, our results indicate that beech populations on the western side of the Rodopi mountains were morphologically closer to F. sylvatica, while populations on the eastern side of Rodopi seemed to be closer to F. orientalis. An introgression zone in NE Greece, where the two beech species presumably meet, has been suggested by several authors, based on morphological traits, vegetation zones and genetic markers [8,9,15,16]. Our results support this scenario and confirm the observations of previous studies that report of possible species-related morphological differences in beech leaves on an east-west gradient in Rodopi [17].…”

Section: Resultssupporting

confidence: 91%

“…5b). Our results indicate that diversity patterns of shade leaves seem to correspond with the differences in species composition between beech populations growing in different geographical locations, as described by previous genetic studies on the same populations [7,8,16]. Thus, the hypothesis tested in this study that morphological differences among populations may differ between shade and light leaves is confirmed.…”

Section: Resultssupporting

confidence: 89%

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Diversity in Shade and Light Leaf Morphology in Beech Populations of South Rodopi Mountains

Boutsios

Vidalis

Adamidis

et al. 2020

Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci.

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The size and shape of tree leaves and their variation within the canopy are the result of both physiological plasticity and an overall adaptive strategy against unfavourable environmental conditions. In this study, diversity patterns at leaf morphological traits will be described within and among populations of trees with different phylogenetic background. Beech (Fagus sp.) is a widespread tree in Eurasia, represented by two species; F. sylvatica in Europe and F. orientalis in eastern Europe and Asia. Both species appear in the Rodopi mountains, in southeast Balkans. Five beech populations were sampled in the southern slopes of Rodopi along a west–east gradient representing an established transitional zone between the two beech species. The diversity of six leaf traits was examined in shade leaves and leaves exposed to direct irradiation. Significant differences appeared among populations and among the two shading classes. Western beech populations consisted of trees with smaller leaves and fewer veins and were morphologically closer to F. sylvatica, while eastern populations seemed to be closer to F. orientalis. Shade leaves were constantly larger and less round than light leaves, probably due to different light harvesting strategies. The differences between populations were larger for shade leaves than for light leaves and presented a clear east–west trend, consistent to the differentiation pattern provided by previous genetic studies in the same region. Our results indicate that shade leaves probably maintain their size and shape independent from light irradiation and therefore may better express genetic differences among populations.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 89%

Diversity in Shade and Light Leaf Morphology in Beech Populations of South Rodopi Mountains

Boutsios

Vidalis

Adamidis

et al. 2020

Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci.

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“…Results also agree with (i) previous morphological (Denk, 1999a, b) and population-scale isoenzyme and genetic studies (Gömöry & Paule, 2010;Bijarpasi et al, 2020), which identified a split between disjunct populations traditionally considered as F. orientalis in Europe and adjacent Asia Minor (Iran and Caucasus); and (ii) the relatively recent contact and mixing between the westernmost F. orientalis (here represented by a Greek sample) and F. sylvatica s.str. (Papageorgiou et al, 2008;Müller et al, 2019).…”

Section: Inter-species Relationships and Status Of Iranian F Orientalismentioning

confidence: 99%

5S-IGS rDNA in wind-pollinated trees (FagusL.) encapsulates 55 million years of reticulate evolution and hybrid origins of modern species

Cardoni

Piredda

Denk

et al. 2021

Preprint

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Standard models of speciation assume strictly dichotomous genealogies in which a species, the ancestor, is replaced by two offspring species. The reality is more complex: plant species can evolve from other species via isolation when genetic drift exceeds gene flow; lineage mixing can give rise to new species (hybrid taxa such as nothospecies and allopolyploids). The multi–copy, potentially multi–locus 5S rDNA is one of few gene regions conserving signal from dichotomous and reticulate evolutionary processes down to the level of intra-genomic recombination. Here, we provide the first high-throughput sequencing (HTS) 5S intergenic spacer (5S – IGS) data for a lineage of wind-pollinated subtropical to temperate trees, the Fagus crenata – F. sylvatica s.l. lineage, and its distant relative F. japonica. The observed 4,963 unique 5S – IGS variants reflect a long history of repeated incomplete lineage sorting and lineage mixing since the early Cenozoic of two or more paralogous-homoeologous 5S rDNA lineages. Extant species of Fagus are genetic mosaics and, at least to some part, of hybrid origin.

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“…Статус вида восточного бука дискуссионен: ряд зарубежных авторов считает его конспецифичным с европейским лесным буком -Fagus sylvatica L. (Denk et al, 2001;2002), другие авторы рассматривают как подвид F. sylvatica subsp. orientalis (Lipsky) Greuter et Burdet (Müller et al, 2019). А. А. Колаковский (Kolakovskiy, 1982) считал F. orientalis близким к F. sylvatica и связанным с ним постепенными переходными формами -F. taurica Popl.…”

Section: Introductionunclassified

“…sylvatica (средняя G ST -0,005) и F. sylvatica subsp. orientalis (средняя G ST -0,008), но между двумя подвидами различия были существенные (средняя G ST -0,122) (Müller et al, 2019).…”

Section: Introductionunclassified

Population genetic analysis of Fagus orientalis Lipsky from the territory of the Crimea and the Caucasus

Алиев¹,

Колтунова²,

Куцев³

et al. 2020

Turczaninowia

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The genetic structure of 20 populations of Fagus orientalis Lipsky (oriental beech) from the territory of the Crimea and the Caucasus was studied on the basis of microsatellite polymorphism (SSR – simple sequence repeats). The isolation distance test performed in the GenePop program showed a high correlation of genetic differences and the logarithm of geographic distance in geographic coordinates at the 0.91 level. Interpopulation genetic differentiation of Fagus orientalis (Fst) ranged from 0.01 to 0.67. On the basis of the obtained genetic data and analysis of the literature on fossil materials, we present a preliminary reconstruction of the possible pathways for spread and the formation of the modern area of the species in the Crimea and on the Caucasian Isthmus within the Caucasian ecoregion. The earliest separation occurred in the populations of the mountainous Crimea and the Stavropol Upland, which retained the unique features of the genotype of the ancestral form in conditions of island isolation. Apparently, beeches from relict mid-mountain populations in refugia of mesophilic vegetation are close to the ancestral form: Colchis (Avadhara, Abkhazia) in the west and Kakheti (Lagodekhi, Georgia) in the east. The observed similarity at the upper border of the beech belt in different regions of the Caucasian Isthmus indicates a parallelism in the development and formation of high-mountain populations of the species.

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Indications of Genetic Admixture in the Transition Zone between Fagus sylvatica L. and Fagus sylvatica ssp. orientalis Greut. & Burd

Cited by 19 publications

References 44 publications

Diversity in Shade and Light Leaf Morphology in Beech Populations of South Rodopi Mountains

Diversity in Shade and Light Leaf Morphology in Beech Populations of South Rodopi Mountains

5S-IGS rDNA in wind-pollinated trees (FagusL.) encapsulates 55 million years of reticulate evolution and hybrid origins of modern species

Population genetic analysis of Fagus orientalis Lipsky from the territory of the Crimea and the Caucasus

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